Realtek is known for manufacturing semiconductors and distributing them worldwide. Realtek possesses a large business of microchips, and large computer manufacturers mostly use its microchips in their products. One of the best selling components of Realtek is its network adapter chips which are used in most of the computers these days. However, some people are not satisfied with the speed it provides. Many users are claiming that they are not getting the speed on their PC, which their network offers. At the same time, other devices can run at full speed.